CN113369306A - Automatic steel cutting control method for cold shears - Google Patents
Automatic steel cutting control method for cold shears Download PDFInfo
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- CN113369306A CN113369306A CN202110632858.XA CN202110632858A CN113369306A CN 113369306 A CN113369306 A CN 113369306A CN 202110632858 A CN202110632858 A CN 202110632858A CN 113369306 A CN113369306 A CN 113369306A
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- control method
- proximity switch
- rolling
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- steel cutting
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
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Abstract
The invention provides a cold shear automatic steel cutting control method, which relates to the technical field of steel rolling control and comprises the following steps: installing a proximity switch, setting a control program, actually operating, setting a first-stage rolling cut, evaluating speed compensation and designing a control picture; the invention cancels the use of an absolute value encoder with DP communication, thus avoiding the problem that the absolute value encoder with DP communication affects other equipment on the whole DP network, realizes the control mode of cold shearing automatic steel cutting by only adopting one proximity switch through design and programming, has simple control, clear principle and convenient point inspection and maintenance after improvement, only needs a few minutes for replacing the proximity switch in an accident state, effectively reduces the fault processing time, constructs a calculation option, and an operator calculates and obtains the parameter of the first section of rolling position according to different set intervals, thereby being convenient for changing the interval time of the first section of rolling according to the requirement and avoiding the deviation of the first section of rolling.
Description
Technical Field
The invention relates to the technical field of steel rolling control, in particular to a cold shear automatic steel cutting control method.
Background
In steel rolling control in the steel industry, automatic steel cutting of cold shears is completed by matching a DP communication absolute value encoder with a main shaft proximity switch, the position for installing the absolute value encoder and the proximity switch is narrow, so that the spot inspection and maintenance are not convenient, the time for replacing the absolute value encoder is long and is generally more than one hour, and the accident time is long when spare parts are replaced in an accident state;
and moreover, the absolute value encoder of DP communication is adopted to carry out programming, the programming is complex, the post personnel debugging and parameter modification are inconvenient, and a DP communication mode is adopted, so that once a DP circuit of the encoder has a problem, other DP communication equipment on the whole DP communication network can be influenced, and the accident is enlarged.
Disclosure of Invention
Aiming at the problems, the invention provides an automatic steel cutting control method for cold shears, which cancels an absolute value encoder with DP communication, thus avoiding the problem that the absolute value encoder with DP communication influences other equipment on the whole DP network, realizes the control mode of the automatic steel cutting of the cold shears by only adopting one proximity switch through design and programming, has simple control after improvement, clear principle and convenient point inspection and maintenance, and only needs a few minutes for replacing the proximity switch in an accident state, compared with the original one hour, effectively reduces the fault processing time and is convenient for post personnel to operate.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a cold shear automatic steel cutting control method comprises the following steps:
the method comprises the following steps: mounting proximity switches
In a steel rolling production line, a bracket which is originally provided with an absolute value encoder and a proximity switch is detached, and a bracket is reinstalled to be used for installing a proximity switch and used on line;
step two: setting a control program
Programming based on a Siemens PLC400 system, setting a proximity switch control program, associating a proximity switch with a reset signal port of the cold shear, and applying the proximity switch to the system;
step three: actual operation
When the cold shears operate, after the cold shears receive a steel cutting command, the brake is opened, the clutch is closed, the shear blade descends, after the approach switch detects a signal, a reset signal is sent, the clutch is released, the brake is held tightly, the shear blade stays at a high position, and the steel cutting operation is performed for the next time;
step four: first stage rolling and cutting device
Setting a length detection program based on a Siemens PLC400 system, performing length detection on a target rolled product by using a length calculator, constructing an initial value L and a set point M setting option, wherein the initial value L is the initial position of a target sensed by the length calculator, the set point M is the interval time of a first section of rolling, calculating a first section of rolling position N by adding delay time of cold shear starting through a formula, and constructing a calculation option for checking whether the requirements are compounded;
step five: velocity compensated evaluation
Carrying out three-dimensional model construction on the image of the real-time steel rolling production line, carrying out operation simulation, setting interval time in the model, then operating at a standard target product transportation speed V, recording the shearing position, then operating at the parameters in the actual steel rolling production line, recording the shearing position, and comparing and recording the difference value to be used as a speed compensation value;
step six: design control picture
Based on Siemens WINCC software, an operation and control picture is designed, control input options of the target product transportation speed V and the shearing interval time M are set, and meanwhile, a speed compensation value is added into the option of the target product transportation speed V.
The further improvement lies in that: in the first step, the proximity switch is connected with the Siemens PLC400 system, the Siemens PLC400 system is used for detecting the proximity switch in real time, and an alarm is given when the proximity switch is abnormal.
The further improvement lies in that: in the second step, the proximity switch control program is programmed by using ampl (abb MasterPiece language), and the control program includes: a read position template DSDP140B, a write position template DSDP140B, and a fire pulse template DSDP150, all associated with a reset signal port of the cold shear.
The further improvement lies in that: in the third step, after 500MS, the clutch is closed, the shear blade descends, in addition, in the third step, the clutch is loosened, and after 1S delay, the brake is tightly held.
The further improvement lies in that: in the fourth step, the calculation formula of the first section rolling cutting position N is as follows:
N＝V×(T+M)+L
v is the transport speed of the target product, T is the delay time of cold shear starting, the setting of the first section of rolling position is completed, and an operator obtains the parameters of the first section of rolling position from a system display by using calculation options according to different set interval time to check whether the requirements are compounded.
The further improvement lies in that: and in the fifth step, performing three-dimensional model construction on the image of the real-time steel rolling production line by adopting ContextCapture, and inputting the three-dimensional model into 3D hardware for operation simulation.
The further improvement lies in that: and fifthly, observing whether the two shearing positions are the same, recording the difference when the two shearing positions are different, calculating the deviation between the set speed and the actual speed as a speed compensation value, and if the two shearing positions are the same, setting the speed compensation value to be 0.
The invention has the beneficial effects that:
1. the invention cancels the absolute value encoder with DP communication, thus avoiding the problem that the absolute value encoder with DP communication affects other devices on the whole DP network, realizes the control mode of cold shearing automatic steel cutting by only adopting one proximity switch through design and programming, has simple control, clear principle and convenient point inspection and maintenance after improvement, and effectively reduces the fault processing time compared with the original one hour by only needing a few minutes for replacing the proximity switch in an accident state, thereby being convenient for post personnel to operate.
2. The method comprises the steps of utilizing a length calculator to detect the length of a target rolled product, obtaining the initial position of a sensing target, setting the interval time of the first-stage rolling, calculating the first-stage rolling position by adding the delay time of cold shear starting through a formula, constructing calculation options, calculating and obtaining the parameters of the first-stage rolling position from a system display by an operator according to different set interval times, checking whether the requirements are combined or not, conveniently changing the interval time of the first-stage rolling according to the requirements and avoiding the deviation of the first-stage rolling.
3. The invention carries out three-dimensional model construction and operation simulation on the image of the real-time steel rolling production line, compares the three-dimensional model construction with the actual operation, calculates the deviation value of the set speed and the actual speed as a speed compensation value, and adds the speed compensation value into the option of the target product transportation speed to further reduce the error.
Drawings
FIG. 1 is a flow chart of the present invention.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
According to the illustration in fig. 1, the embodiment provides a control method for automatically cutting steel by cold shears, which comprises the following steps:
the method comprises the following steps: mounting proximity switches
In a steel rolling production line, a bracket which is originally provided with an absolute value encoder and a proximity switch is detached, and a bracket is reinstalled to be used for installing a proximity switch and used on line;
step two: setting a control program
Based on the siemens PLC400 system, programming is performed, and a proximity switch control program is set, the proximity switch control program is programmed by using ampl (abbmasterpierce language), and the control program comprises: reading a positioning template DSDP140B, writing a positioning template DSDP140B and starting a pulse template DSDP150, wherein the templates are all related to a reset signal port of the cold shears and are applied to the system, a proximity switch is connected with a Siemens PLC400 system, the Siemens PLC400 system is used for detecting the proximity switch in real time, and an alarm is given when the proximity switch is abnormal;
step three: actual operation
When the cold shears operate, after the cold shears receive a steel cutting command, the brake is opened, the clutch is closed after 500MS, the shear blade descends, after the approach switch detects a signal, a reset signal is sent, the clutch is released, after 1S delay, the brake is tightly held, the shear blade stays at a high position, and the steel cutting operation is performed for the next time;
step four: first stage rolling and cutting device
Based on a Siemens PLC400 system, a length detection program is set, a length calculator is used for carrying out length detection on a target rolled product, setting options of an initial value L and a set point M are established, the initial value L is the initial position of a target sensed by the length calculator, the set point M is the interval time of a first section of rolling, a delay time of cold shear starting is added through a formula to calculate a first section of rolling position N, and the calculation formula of the first section of rolling position N is as follows:
N＝V×(T+M)+L
v is the transport speed of a target product, T is the delay time of cold shear starting, the setting of a first section of rolling position is completed, calculation options are constructed, and an operator obtains parameters of the first section of rolling position from a system display by using the calculation options according to different set interval time to check whether the requirements are compounded;
step five: velocity compensated evaluation
Adopting ContextCapture to carry out three-dimensional model construction on images of a real-time steel rolling production line, inputting the three-dimensional model into 3D mark software to carry out operation simulation, setting interval time in the model, then operating at a standard target product transportation speed V, recording a shearing position, then operating with the parameters in the actual steel rolling production line, recording the shearing position, observing whether the two shearing positions are the same, recording a difference value when the two shearing positions are different, calculating a deviation value between a set speed and an actual speed as a speed compensation value, and when the two shearing positions are the same, setting the speed compensation value as 0;
step six: design control picture
Based on Siemens WINCC software, an operation and control picture is designed, control input options of the target product transportation speed V and the shearing interval time M are set, and meanwhile, a speed compensation value is added into the option of the target product transportation speed V.
The cold-shearing automatic steel-cutting control method cancels an absolute value encoder with DP communication, thereby avoiding the problem that the absolute value encoder with DP communication affects other equipment on the whole DP network, realizes the control mode of cold-shearing automatic steel-cutting by only adopting one proximity switch through design and programming, has simple control, clear principle and convenient point inspection and maintenance after improvement, has the advantages of only a few minutes for replacing the proximity switch in an accident state, effectively reduces the fault processing time compared with the original one hour, is also convenient for post personnel to operate, simultaneously utilizes a length calculator to carry out length detection on a target rolled product, obtains the initial position of a sensing target, sets the interval time of the first rolling, calculates the first rolling position by adding the delay time of cold-shearing starting through a formula, and constructs calculation options, in addition, the method carries out three-dimensional model construction and operation simulation on the images of the real-time steel rolling production line, compares the three-dimensional model construction with the actual operation, calculates the deviation amount of the set speed and the actual speed as a speed compensation value, adds the deviation amount into the option of the target product transportation speed, and further reduces the error.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The automatic steel cutting control method for the cold shears is characterized by comprising the following steps of:
the method comprises the following steps: mounting proximity switches
In a steel rolling production line, a bracket which is originally provided with an absolute value encoder and a proximity switch is detached, and a bracket is reinstalled to be used for installing a proximity switch and used on line;
step two: setting a control program
Programming based on a Siemens PLC400 system, setting a proximity switch control program, associating a proximity switch with a reset signal port of the cold shear, and applying the proximity switch to the system;
step three: actual operation
When the cold shears operate, after the cold shears receive a steel cutting command, the brake is opened, the clutch is closed, the shear blade descends, after the approach switch detects a signal, a reset signal is sent, the clutch is released, the brake is held tightly, the shear blade stays at a high position, and the steel cutting operation is performed for the next time;
step four: first stage rolling and cutting device
Setting a length detection program based on a Siemens PLC400 system, performing length detection on a target rolled product by using a length calculator, constructing an initial value L and a set point M setting option, wherein the initial value L is the initial position of a target sensed by the length calculator, the set point M is the interval time of a first section of rolling, calculating a first section of rolling position N by adding delay time of cold shear starting through a formula, and constructing a calculation option for checking whether the requirements are compounded;
step five: velocity compensated evaluation
Carrying out three-dimensional model construction on the image of the real-time steel rolling production line, carrying out operation simulation, setting interval time in the model, then operating at a standard target product transportation speed V, recording the shearing position, then operating at the parameters in the actual steel rolling production line, recording the shearing position, and comparing and recording the difference value to be used as a speed compensation value;
step six: design control picture
Based on Siemens WINCC software, an operation and control picture is designed, control input options of the target product transportation speed V and the shearing interval time M are set, and meanwhile, a speed compensation value is added into the option of the target product transportation speed V.
2. The automatic steel cutting control method for the cold shears according to claim 1, wherein the control method comprises the following steps: in the first step, the proximity switch is connected with the Siemens PLC400 system, the Siemens PLC400 system is used for detecting the proximity switch in real time, and an alarm is given when the proximity switch is abnormal.
3. The automatic steel cutting control method for the cold shears according to claim 1, wherein the control method comprises the following steps: in the second step, the proximity switch control program is programmed by using ampl (abb MasterPiece language), and the control program includes: a read position template DSDP140B, a write position template DSDP140B, and a fire pulse template DSDP150, all associated with a reset signal port of the cold shear.
4. The automatic steel cutting control method for the cold shears according to claim 1, wherein the control method comprises the following steps: in the third step, after 500MS, the clutch is closed, the shear blade descends, in addition, in the third step, the clutch is loosened, and after 1S delay, the brake is tightly held.
5. The automatic steel cutting control method for the cold shears according to claim 1, wherein the control method comprises the following steps: in the fourth step, the calculation formula of the first section rolling cutting position N is as follows:
N＝V×(T+M)+L
v is the transport speed of the target product, T is the delay time of cold shear starting, the setting of the first section of rolling position is completed, and an operator obtains the parameters of the first section of rolling position from a system display by using calculation options according to different set interval time to check whether the requirements are compounded.
6. The automatic steel cutting control method for the cold shears according to claim 1, wherein the control method comprises the following steps: and in the fifth step, performing three-dimensional model construction on the image of the real-time steel rolling production line by adopting ContextCapture, and inputting the three-dimensional model into 3D hardware for operation simulation.
7. The automatic steel cutting control method for the cold shears as claimed in claim 6, wherein the control method comprises the following steps: and fifthly, observing whether the two shearing positions are the same, recording the difference when the two shearing positions are different, calculating the deviation between the set speed and the actual speed as a speed compensation value, and if the two shearing positions are the same, setting the speed compensation value to be 0.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1022157A (en) * | 1963-06-12 | 1966-03-09 | Spidem Ste Nle | Device using a shearing element in a fixed position to cut constant lengths from a strip moving past at high speed |
| US4545228A (en) * | 1982-11-15 | 1985-10-08 | Hitachi, Ltd. | Roll eccentricity control system for a rolling apparatus |
| CN102023610A (en) * | 2010-10-14 | 2011-04-20 | 中冶华天南京自动化工程有限公司 | Method and device for achieving positioning and shearing control of flying shear by process software |
| CN102728884A (en) * | 2012-06-08 | 2012-10-17 | 中冶南方工程技术有限公司 | Positioning and zero setting method and device for high-speed rotating flying shear blade |
| CN105537271A (en) * | 2015-12-02 | 2016-05-04 | 北京佰能电气技术有限公司 | Flying shear control system based on hot metal detectors and control method thereof |
| CN107570786A (en) * | 2017-09-14 | 2018-01-12 | 阳春新钢铁有限责任公司 | A kind of flying shear control system and method |
-
2021
- 2021-06-07 CN CN202110632858.XA patent/CN113369306B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1022157A (en) * | 1963-06-12 | 1966-03-09 | Spidem Ste Nle | Device using a shearing element in a fixed position to cut constant lengths from a strip moving past at high speed |
| US4545228A (en) * | 1982-11-15 | 1985-10-08 | Hitachi, Ltd. | Roll eccentricity control system for a rolling apparatus |
| CN102023610A (en) * | 2010-10-14 | 2011-04-20 | 中冶华天南京自动化工程有限公司 | Method and device for achieving positioning and shearing control of flying shear by process software |
| CN102728884A (en) * | 2012-06-08 | 2012-10-17 | 中冶南方工程技术有限公司 | Positioning and zero setting method and device for high-speed rotating flying shear blade |
| CN105537271A (en) * | 2015-12-02 | 2016-05-04 | 北京佰能电气技术有限公司 | Flying shear control system based on hot metal detectors and control method thereof |
| CN107570786A (en) * | 2017-09-14 | 2018-01-12 | 阳春新钢铁有限责任公司 | A kind of flying shear control system and method |
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